using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MidtermProj_Sim_134713
{
    class Inventory
    {
        public Items[] inventoryitems;
        public int max;
        public int current;
        int inventorycode2;
        double inventoryprice2;
        bool validinventorycode;
        bool validinventoryprice;
        string inventorycode;
        string inventoryname;
        string inventoryprice;

        public Inventory()
        {
            max = 25;
            inventoryitems = new Items[max];
            current = 0;
        }

        public Items Find(string inventorycode)
        {
            Items target = null;

            for (int i = 0; i < max; i++)
            {
                if (inventoryitems[i] != null)
                {
                    if (inventorycode == inventoryitems[i].GetCode())
                    {
                        target = inventoryitems[i];
                        break;
                    }
                }
            }
            return target;
        }

        public void AddItems()
        {
            Console.Clear();
         do
            {

                Console.Write("Input Inventory Code: ");
                inventorycode = Console.ReadLine();
                validinventorycode = int.TryParse(inventorycode, out inventorycode2);
                if (inventorycode == "\\c")
                {
                    Console.WriteLine("Transacation Cancelled!");
                    validinventorycode = true;
                }
                else if ((validinventorycode == false) || (inventorycode.Length != 5))
                {
                    Console.WriteLine("Inventory Code is Invalid!");
                    validinventorycode = false;
                }

                for (int i = 0; i < current; i++)
                {
                    if (inventorycode == inventoryitems[i].GetCode())
                    {
                        Console.WriteLine("Inventory code already exists.");
                        validinventorycode = false;
                    }
                }
            }while ((validinventorycode == false));
         if (inventorycode != "\\c")
         {
             do
             {
                 Console.Write("Input Inventory Name: ");
                 inventoryname = Console.ReadLine();

                 if (inventoryname == "\\c")
                 {
                     Console.WriteLine("Transaction Cancelled!");
                     validinventorycode = true;
                 }
             }
             while (validinventorycode == false);

             if (inventoryname != "\\c")
             {
                 do
                 {
                     Console.Write("Input Inventory Price: ");
                     inventoryprice = Console.ReadLine();
                     validinventoryprice = double.TryParse(inventoryprice, out inventoryprice2);
                     if (inventoryprice == "\\c")
                     {
                         Console.WriteLine("Transaction Cancelled!");
                         validinventoryprice = true;
                     }
                     if (validinventoryprice == false)
                     {
                         Console.WriteLine("Inventory price is invalid!");
                     }
                 }
                 while ((validinventoryprice == false));

                 if (current > max)
                 {
                     Console.WriteLine("Inventory is full.");
                 }

                 if (inventoryprice != "\\c")
                 {
                     Console.WriteLine("Inventory is successfully added.");
                     inventoryitems[current] = new Items(inventorycode, inventoryname, inventoryprice);
                     current++;
                 }

                }
            }
        }

        public void EditInventory()
        {
            int i = 0,x=0 ;
            Console.Clear();
            Items target = Find(inventorycode);
            do
            {
                Console.Write("Input Inventory Code: ");
                inventorycode = Console.ReadLine();
                validinventorycode = int.TryParse(inventorycode, out inventorycode2);
                if (inventorycode == "\\c")
                {
                    Console.WriteLine("Transacation Cancelled.");
                    validinventorycode = true;
                }
                else if ((validinventorycode == false) || (inventorycode.Length != 5))
                {
                    Console.WriteLine("Inventory code is invalid!");
                }

                for (i= 0; i < current; i++)
                {

                        if (inventorycode == inventoryitems[i].GetCode())
                        {
                            x = 1;
                            target = inventoryitems[i];

                            Console.Write("Change Name [{0}]: ", target.GetName());
                            inventoryname = Console.ReadLine();
                            if (inventoryname == "")
                            {
                                inventoryname = target.GetName();
                            }
                            if (inventoryname == "\\c")
                            {
                                Console.WriteLine("Transaction cancelled!");
                            }
                            else
                            {
                               do
                                {
                                    Console.Write("Change Price [{0}]: ", target.GetPrice());
                                    inventoryprice = Console.ReadLine();
                                    validinventoryprice = double.TryParse(inventoryprice, out inventoryprice2);

                                    if (inventoryprice == "\\c")
                                    {
                                        Console.WriteLine("Transaction cancelled!");
                                    }
                                    else if (validinventoryprice == false)
                                    {
                                        Console.WriteLine("Invalid Inventory Price!");
                                    }
                                    else
                                    {
                                        target.code = inventorycode;
                                        target.name = inventoryname;
                                        target.price = inventoryprice;
                                        Console.WriteLine("Inventory Item " + target.GetCode() + " Successfully Edited!");
                                        validinventoryprice = true;
                                    }
                                } while ((validinventoryprice == false));
                            }
                            i = current;
                            validinventorycode = true;
                        }
                }
                if (x == 0 && inventorycode.Length==5)
                {
                    Console.WriteLine("Inventory Code Does Not Exists!");
                }
            }while (validinventorycode == false);
        }

        public void DeleteInventory()
        {
            int y = 0;
            Console.Clear();
            do
            {
                Console.Write("Input Inventory Code: ");
                inventorycode = Console.ReadLine();
                validinventorycode = int.TryParse(inventorycode, out inventorycode2);
                if (inventorycode == "\\c")
                {
                    Console.WriteLine("Transacation Cancelled.");
                }
                if ((validinventorycode == false) || (inventorycode.Length != 5))
                {
                    Console.WriteLine("Inventory code is invalid!");
                }
            }
            while ((inventorycode.Length != 5) || (inventorycode == "\\c") || (validinventorycode == false));

            if ((validinventorycode == true) && (inventorycode.Length == 5) && (inventorycode != "\\c"))
            {
                Items target = Find(inventorycode);

                for (int i = 0; i < current; i++)
                {
                    if (inventorycode == inventoryitems[i].GetCode())
                    {
                        y = 1;
                        Console.WriteLine("=================");
                        Console.WriteLine("{0}", target.GetName());
                        Console.WriteLine("{0}", target.GetPrice());
                        Console.WriteLine("=================");
                        Console.Write("Are you sure you want to delete this entry? [y/n]: ");
                        string answer = Console.ReadLine();

                       if (answer == "Y" || answer == "y")
                            {
                                if (inventoryitems[i] != null)
                                {
                                    inventoryitems[i] = null;
                                    current--;
                                    Console.WriteLine("Entry Deleted!");
                                }
                            }
                            else if (answer == "N" || answer == "n" || answer == "\\c")
                            {
                                Console.WriteLine("Transaction Cancelled!");
                            }
                    }
                }
                if (y == 0 && inventorycode.Length == 5)
                    Console.WriteLine("Inventory code does not exist.");

            }
        }

        public void DisplayAllItems()
        {
            Console.Clear();
            Console.WriteLine("--------------------------------------------");
            Console.WriteLine("|Code             Name                Price|");
            Console.WriteLine("--------------------------------------------");
            for (int i = 0; i <= current; i++)
            {
                if (current == 0)
                {
                    Console.WriteLine("Inventory is empty.");
                }
                else if (inventoryitems[i] != null)
                {
                    Console.WriteLine("|{0}\t\t{1}\t\t{2}|", inventoryitems[i].GetCode(), inventoryitems[i].GetName(), inventoryitems[i].GetPrice());

                }
            }
            Console.WriteLine("--------------------------------------------");
        }

        public void ClearInventory()
        {

            Console.Clear();
            if (current == 0)
                Console.WriteLine("Inventory is empty.");
            else
            {
                Console.Write("Are you sure you want to delete all entries? [y/n]:");
                string answer = Console.ReadLine();
                if (answer == "Y" || answer == "y")
                {
                    for (int i = 0; i < current; i++)
                    {
                        if (inventoryitems[i].code != null)
                        {
                            inventoryitems[i].code = null;
                            inventoryitems[i].price = null;
                            inventoryitems[i].name = null;
                            current--;
                        }

                    }
                    Console.WriteLine("All inventory items deleted");
                }
                else
                    Console.WriteLine("Transaction Cancelled!");
            }
        }
    }

}